Riveting machine



Jan. 1945- A. R. HAVENER RIVETING MACHINE Filed April 25, 1959 2 Sheets-Sheet l W Wfl A. R. HAVENER RIVETING MACHINE Filed April 25. 1959 2 Sheets-Sheet 2 mam/hwy Patented Jan. 2 1945 UNITED STATE r tTENT ()FFICE Judson L. Thomson Manufacturing Company, Waltham, Mass., a corporation of Massachu setts Application April 25, 1939, Serial No. 269,926

11 Claims.

This invention relates to machines for setting rivets or similar fastenings and has for an object to provide improved and simplified means for controlling and moving the rivet holder in time with the rivet-driving mechanism and in a diiierential relation thereto and without requiring the use of cams or other complicated mechanism, Such means is so arranged that as the rivet driver first moves downwardly'close to the head of the rivet in the holder, the holder moves in unison with the driver until it is close to the work, whereupon it stops and the driver continues its downward journey to drive the rivet out of the holder and to set it in the work. This is preferably accomplished by a pair of slides, one mounted on the driving means and movable therewith, and the other frictionally connected to it in overlapping relation and adapted to move the holder at the appropriate time. When the holder engages a stop, then the frictional connection between the two slides permits relative movement between them. The provision of this means contributes in a large measure to the simplification of the machine and eliminates all cams and other parts necessitated by cams, and permits the use of a simple crank arm as the operating means.

A further improvement resides in a simplified mechanism for actuating the rivet separator which insures the proper presentation of rivets to the holder and driver.

Further objects and advantages will appear from a more complete description of certain embodiments of this invention shown in the accompanying drawings in which Figure 1 is a right side elevation of the forward portion of a riveting machine embodying this invention.

Figure 2 is an exploded perspective view of a friction device used in the construction shown in Figure 1.

Figure 3 is a view partly in front elevation and partly in section on line 3-3 of Figure 1.

Figure 4 is a detail section on line 4-4 of Figure 3.

Figure 5 is a view similarto Figure 4, but showing the parts in difierent positions.

jaws being mounted for yielding motion from each other sufficient to permit the rivet as at I 55 to be forced downwardly between them into the Work. These jaws are shown as carried by strips i56 which may be yieldable in themselves or may be so mounted as to be movable to open and close the laws in the well known manner. The rivet holder support I 53 is shown as provided with a pair of lateral extensions I51 and I58 through which extends a rod or pin I60, this pin extending completely through the support I53. On the right hand end of this pin I60 there is mounted a slide I6 I, which as shown best in Figures 4 and 5, is provided with a slot I62 through which the pin I 60 projects. A washer I63 secured to the adjacent end of the pin I60 as by a screw" I64 secures the block or slide l6! in position on the pin I 60 but with capability of lost motion relative thereto by reason of the slot I62. The extent of this lost motion in an upward direction of motion of the slide I6I may be adjustably fixed as by a stop screw I65 which may impinge on a Referring to these figures, at I is shown the ram to the lower end of which is secured the rivet setor driver I5I, This ram is vertically slidable through a sleeve portion I52 of the frame and also extends into the upper portion of the rivet holder support I53 within which it is slidably guided. This rivet holder support I53 carries at its lower end a rivet holder comprising a pair of jaws I54 which directly support the rivet, these pin I66 projecting outwardly from the sleeve portion I52. The lower limit of motion of the slide I6I with respect to the rivet holder support I53 is determined by the upper end of the slot I62. In overlapping relation to the slide I6I and the rivet holder support is arranged a rivet holder driver I10. Thisdriver is formed as a fiat bar, the upper end of which is provided with a boss I1I which fits on a transverse pivot pin I12 which secures the upper end of the ram I50 to the forward end of an actuating arm I13 which may be rocked downwardly as by a crank (not shown) operatively connecting to its opposite end inorder to actuate the ram I50. The mounting and actuation of this arm may be similar to that shown in my Patent No, 1,276,652 granted August 20, 1918. The driver I10 is slotted centrally throughout the major portion of its length as at I15 and through this slot extends a screw I16. As shown best in Figures 2 and 3, this screw I16 is carried by the slide or block I6I and extends through a channel portion I11 therein, through the friction plates I18 and I19, the slot I15 of the driver bar, a bearing plate I and a leaf spring I8I. A nut I32 threaded on the outer end of the screw I16 serves to press the friction plates I18 and I19 against opposite faces of the driver bar I10 so as to provide a yielding frictional engagementbetween the driver bar I10 and the sliding block I6I. U

The opposite end of the pin" I60 has a reduced diameter portion; I on'which is mounted the lower end of a bar I84. This bar, as shown best in Figures 4 and 5, is provided with a rearwardly extending pin I86 over which is hooked the lower end of a coil spring I81, the upper end of which is secured as by being passed through a hole therethrough in the extended end portion I88 of the pivot pin I12. This spring I81 yieldingly holds the bar I84 upwardly and thus tends to hold the rivet holder support or slide I53 in its upward position, but is of insufiicient strength to retain the holder support I53 in its raised position against the pressure of the rivet driver or set I5I and the frictional engagement between the driver I10 and the friction block I6I when the ram I50 is in driving position or is being moved theretoward' The bar I84 has threaded in its upper end an adjustable stop screw I90, which, when the ram is depressed, may impinge upon a fixed stop I9I thus to limit the downward motion of therivet holder slide or support I53, so that after this limit has been reached, further downward motion of the ram I.50causes thedriver .I.10 to slide. relative to the block I6I. The screw I90 may be fixed in adjusted position by a lock nut I92 threaded thereon and provided with an actuating handle I93.

Assuming the. driver at its lifted position of Figures l and 3, and the work being positioned over the anvil as shown in dash and dotted lines, downward motion of the ram to drive the rivet first causes a downward motion of the slide IEI with the driver I10 until the upper end of the slot I62 strikes the'pin I50 .(see Figure 4) this motion being sufficient to bring the rivet set or driver IEI down to, or almost to, the head of the rivet supported between the jaws I54 and I55. Further downward motion of the ram then acts to lower the rivet holder support I53 and the jaws I54 and I55 to their desired position. just above the work, whereupon the stop screw I impinges on. the pin I! as shown Figure 5, which stops the downward motion of the rivet holder. Corrtinned downward motion of. the ram, therefore, produces a sliding between the driver I10 and the slide. .block I6I to the. final driven position of the rivet. On subsequent retracting motion of the ram the parts are returned to their upper position, the extent of return of the block I'EI being determined by impingementof its stop screw I55-0n the fixed stop i 66, the driver I10 sliding relative to the block I'fi I during the final portion of the upward motion of the ram until its top position is reached where the set I is sufficiently lifted to permit av riyet to be fed in beneath it into the position shown in Figure 3 prior to a succeeding setting: operation. The spring I811 insures this lifting of the rivet holder support should the friction between the driver I and the block I6I be insufficien-t. The upward limit of motion of the support I53 is determined by the lower face of the sleeve portion I 52 against which the support I53 impinges.

The driver I10 for the rivet holder-support may also. be. employed to actuatethe rivet separator. Such a separator is. shown at 200 in Figure 3, being provided with. the usual separator finger 2.0! forming one portion of an inclined slot 202 through which the: rivet must pass as: it descends from the raceway 203 to discharged position at the jaws I54 and I 55. By moving this separator 200 back and forth, the separator point passes between the two lowest rivets in the slide. and allows the lowest rivet, as the separator continues to/move to the right in Figure'3, to pass down into driving position. in the well understood manner.

As illustrated, this separator 200 is provided with a reduced diameter portion 205 within which is engaged a cam roller 206 at the lower end of an arm 201 of a bell crank lever. This bell crank lever is fulcrumed at 208 and its arm 209 is provided with a pin 2I0 which passes between the forks 2 I I (see Figure l) of a slide block 212. This slide block 2 I2 is provided with a channel portion similar to that of the slide block IBI and the driver I10 is maintained in frictional engagement therewith through the friction plates 2I5 and HG, the pressure plate 2I1, and the spring H8, in the same manner as has been described with relation to the block IBI, and its frictional connections shownv as separated in Figure 2. The first portion of the motion of the driver I 10 in either direction moves the separator in a corresponding direction throughout the full path of motion or" the separator, any further motion of "the' driver I10 causing slippage of the friction driving connection between the driver I10 and the arm. 209.

From the foregoing-description of an embodiment of this invention, it should be evident to those skilled in the art that various changes and modifications might be madewithout departing from the spirit or scope of this invention.

I claim:

1. In a riveting machine, a rivet holder support, a rivet set, means including a ram for actuating said set, a sleeve slidably supporting said ram, said rivet holder support having a pair of extensions on opposite sides, a slide carried on one of said extensions, a holder support driving member secured to said ram and extending along one side of said sleeve and yieldingly engaging said slide, a bar secured at one end to the other of said extensions and lying along the opposite side of said sleeve, a spring securing said bar to said ram for lifting said holder support on retraction of said ram, and an adjustable stop car ried by said bar and cooperating with a fixed stop for limiting the downward motion of said holder support as driven by said driving member.

2. In a riveting machine, a rivet holder support, a rivet set, means including a ram. for actuatin said set, a sleeve slidably supporting .said ram, said rivet holder supporthaving a guide opening to slidably receive said ram and a pair of extensions on opposite sides, a slidev carried on one of said. extensions, a holder support driving member secured to said ram and extending along one side of said sleeve and yieldingly engaging said slide, a bar secured at one end to the other of said extensions and .lying along the opposite side of said sleeve, a spring securing said bar to said ram for lifting said holder support on retraction of said ram, and an adjustable stop carried by said bar and cooperating with a fixed stop for limiting the downward motion of said holder support as driven by said driving member.

3. In a riveting machine, a rivet holder support, a, rivet holder carried by said support, .a rivet set, means including a ram for actuating said set to drive a rivet held bysaid holder, a pin projecting from said holder support, a slide having a slot for interengagement over said pin, a rivet holder support driving member secured to said ram and. extending through said slide, friction set, means including a ram for actuating said set to drive a rivet held by said holder, said holder support having a socket portion in which said ram is slidably guided, a slide carried by said holder support, a rivet holder support driving member secured to said ram and in sliding relation to said slide, and a yieldable connection between said slide and said driving member.'

5. In a riveting machine, a rivet holder support, a rivet holder carried by said support, a rivet set, mean including a ram for actuating said set to drive a rivet held by said holder, said holder support having a socket portion in which said ram is slidably guided, a slide carried by said holder support and having a limited lost motion connection with said holder support, a rivet holder-support driving member secured to said ram and in sliding relation to said slide, and a yieldable connection between said slide and said driving member.

6. Ina riveting machine, a rivet holder support, a rivet holder carried-by said support, a rivet set, means including-a ram for actuating said set to drive a rivet held 'by said holder, said holder support having a socket portion in which said ram is slidably guided, a slide carried by said holder support, a rivet holder support driving member secured to said ram and in sliding relation to said slide, and a frictional connection between said slide and said driving member.

I 7. In a rivetingmachine, a rivet holder support, a rivet holder carried by said support, a rivet set, means including a ram for actuating said set to drive a rivet held by said holder, said holder support having a socket portion in which said ram is slidably guided, a slide carried by said holder support, a rivet holder support driving member secured to said ram and in sliding relation to said slide, a yieldable connection between said slide and said driving member, and stop means-for limiting the extent of :motion of said holder support with said driving member.

8. In a riveting machine, a rivet holder, a rivet set, means including a ram for actuating said set to drive a rivet held by said holder, a raceway for supplying rivets to said holder, a'rivet separator for restricting the feed of rivets from said raceway to said holder to one at a time and a holder-driving member connected to said ram and yieldingly connected to said holder and to said separator.

9. In a riveting machine, a rivet holder, a rivet set, means including a ram for actuating said set to drive a rivet held by said holder, a raceway for supplying rivets to said holder, a rivet separator for restricting the feed of rivets from said raceway to said holder to one at a time, a holderdriving member connected to said ram and yieldingly connected to said holder, and a frictional drive from said member to said separator.

10. In a riveting machine, a rivet holder, a rivet set, reciprocable means for actuating said set to drive a rivet held by said holder, a raceway for supplying rivets to said holder, a rivet separator for restricting the feed of rivets from said raceway to said holder, and a frictional drive for said separator from said actuating means.

11. In a riveting machine, a rivet holder, a rivet set, means including a ram for actuating said set to drive a rivet held by said holder, a raceway for supplying rivets to said holder, a rivet separator for restricting the feed of rivets from said raceway to said holder to one at a time, a reciprocable driving member connected to said ram, and a frictional connection from said member to said separator.

' ARTHUR R. HAVENER. 

